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Polsat Box - Inverto IDLP 40TL Converter Issues with Low Frequency Channels

idkso 27888 23
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How do I fix missing low-frequency Polsat Box channels when TVP works and my Inverto IDLP 40TL LNB seems fine?

If only some Polsat Box channels are missing, the most likely causes are incorrect band/polarization switching, a bad cable or connector, a slightly misaligned dish, or a faulty LNB rather than a broken transponder [#19976034][#19977026][#20565243] First identify the exact missing channels, because the LNB uses 13/17 V for V/H polarization and 22 kHz signaling for the frequency band, so the fault can be in the receiver, cable, connector, or LNB [#19976034] Check the coax and connectors for corrosion or poor contact, because a damaged cable can pass some signal and block others [#19976034][#19977026] If the wiring is fine, try a very small dish adjustment; one user restored the missing channels by moving the antenna about 1° left or right until the picture returned [#20565243] If that does not help, replace or test the LNB and, if needed, have a proper satellite installer measure the system [#19975713][#19976034]
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  • #1 19975510
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    I have no signal on some of the Polsat channels. TVP is working for me. Low frequencies do not read.
    I have an Inverto IDLP 40TL 0,3 dB converter.
    Antenna somewhere around 80×80 from Cyfra+, but I have Polsat Box .
    Please can someone help me.
    Thanks.
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  • #2 19975713
    clubber84
    Level 38  
    Posts: 4997
    Help: 434
    Rate: 1668
    It could be the fault of the LNB or one of the transponders on the satellite has been switched off for a while (the latter only depends on the operator).
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  • #3 19975745
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    What is a trans ponder?
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  • #4 19975862
    netTv
    Level 32  
    Posts: 1459
    Help: 192
    Rate: 577
    Rest assured, call an antenna installer. He will solve the problem in a dozen minutes or so.
    You don't have the basic knowledge of satellite reception to fix the problem yourself.
    Good advice.
  • #5 19975948
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    Just tried said it was the transponder.
  • #6 19975975
    netTv
    Level 32  
    Posts: 1459
    Help: 192
    Rate: 577
    That is, the one you called has no idea of what he is talking about.
    The transponder is shared by all users of the Polsat Box satellite platform, so it is not possible for it to be damaged if ~4 million other subscribers are receiving Polsat channels.
  • #7 19975978
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    Here where I live, everyone recommends it.
  • #8 19975980
    netTv
    Level 32  
    Posts: 1459
    Help: 192
    Rate: 577
    So deal with such a professional.
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  • #9 19975985
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    Converter probably wrong.
  • #10 19975998
    netTv
    Level 32  
    Posts: 1459
    Help: 192
    Rate: 577
    For that, installer Janusz the expert in the whole village ;)
  • #11 19976002
    idkso
    Level 3  
    Posts: 6
    Rate: 4
    Not in Poland.
  • #12 19976034
    Preskaler
    Level 40  
    Posts: 6402
    Help: 490
    Rate: 1041
    You must first state EXACTLY which channels you are missing because:
    The converter receives channels with V and H polarisation (vertical/horizontal) separately. This switching is done by changing the supply voltage (13/17 V). In addition, it switches the frequency range using a 22 kHz generator. A thorough analysis of the missing channels will allow conclusions to be drawn and the voltage measurement will allow the fault to be located accurately. There may be several reasons for the absence of some channels and only analysis and measurements can help to locate the fault. It could also be, for example, a corroded cable or connectors with poor contact. It could be the converter or the tuner.
  • #13 19976541
    clubber84
    Level 38  
    Posts: 4997
    Help: 434
    Rate: 1668
    idkso wrote:
    I not in Poland
    .
    So, if you "not in Poland", where?

    And, if the "installer" you invited to your house said it was the transponder's fault, that's just the kind of "installer" he is. If it was the fault of the aforementioned, there would be a rash of posts on the forum about users' channels not working in Poland.
    If you don't want a decent TVSAT installer, leave it alone and buy a new converter.
  • #14 19976575
    _kli_
    Level 41  
    Posts: 5263
    Help: 754
    Rate: 1027
    idkso wrote:
    Just tried said it was a transponder
    .
    Transponder or converter? Maybe you are confused about something?
  • #15 19977026
    stansoko
    Level 12  
    Posts: 42
    Help: 4
    Rate: 36
    I had a similar problem, replacing the cable helped. A smarter colleague than me said I had a hole in the cable (not a tight screen) and it was receiving some signal which was blocking some programs
  • #16 19978892
    winmap
    Level 38  
    Posts: 5175
    Help: 361
    Rate: 746
    Converter problem or badly positioned antenna.
  • #17 19979634
    Preskaler
    Level 40  
    Posts: 6402
    Help: 490
    Rate: 1041
    Fortune-telling. The problem should be approached rationally. First analysis and then measurements will indicate the cause.
  • #18 20144750
    majczyn71
    Level 1  
    Posts: 1
    Rate: 3
    Today, i.e. 15/08/2022 13:45 hrs no signal for most programmes on Polsat box platform.
  • #19 20144909
    Preskaler
    Level 40  
    Posts: 6402
    Help: 490
    Rate: 1041
    This is very often the case if the weather conditions are unfavourable.
  • #20 20145198
    tomaszlonski
    Level 38  
    Posts: 3295
    Help: 338
    Rate: 879
    On C+ there are no reception problems throughout the day then Polsat Box should work too.
    What majority of programmes don't work, you haven't even given an example of a few since the beginning.

    You will not solve the problem by complaining about lack of reception, colleagues have already written start with setting up the converter or antenna by a normal installer.
  • #21 20145274
    viayner
    Level 43  
    Posts: 10551
    Help: 1557
    Rate: 2004
    Hello,
    I have encountered similar problems at my place, sometimes once in a few months suddenly on some channels there is no signal, while others work perfectly what is interesting channels from the same transponder behave differently. From my experience a hardware reset (disconnecting from power) of the decoder restores full functionality.
    Several times I have also observed missing signal/poor signal for e.g. half an hour, no clouds at my place, I suspect something was "on the way" or in Poland.
    If it is a permanent lack of signal then you have a badly positioned antenna.
    Regards
  • #22 20145289
    _kli_
    Level 41  
    Posts: 5263
    Help: 754
    Rate: 1027
    viayner wrote:
    A few times I have also observed no signal/poor signal for e.g. half an hour, no clouds at my place
    .
    Adverse weather may have been over or near the transmitting station.
  • #23 20565243
    myszczopyszczek
    Level 12  
    Posts: 46
    Help: 2
    Rate: 10
    I had the same thing, also on digital Polsat. After removing the antenna and reassembling. Signal in options: Strength 78 quality 50. almost all channels worked except a few. On them it displayed a message about an error in connection with the antenna and on cartoons it sometimes hung up, but not all of them. The problem was a slightly misaligned antenna. I solved it as follows: I turned on the channel that was not working and a slight adjustment of 1° left or right. Until I got the picture. It helped.
  • #24 20567210
    Mihal2
    Level 14  
    Posts: 162
    Help: 6
    Rate: 41
    myszczopyszczek wrote:
    I had the same thing, also on digital Polsat. After removing the antenna and reassembling. Signal in options: Strength 78 quality 50. almost all channels worked except a few. On them it displayed a message about an error in connection with the antenna and on cartoons it sometimes hung up, but not all of them. The problem was a slightly misaligned antenna. I solved it as follows: I turned on the channel that was not working and a slight adjustment of 1° left or right. Until I got the picture. It helped.
    .
    You can see the date of the post. This is already an archive.
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Topic summary

✨ The discussion revolves around issues with receiving certain Polsat channels using an Inverto IDLP 40TL converter. The user reports a lack of signal on low-frequency channels while other channels, like TVP, are functioning. Responses suggest potential causes including a faulty LNB, transponder issues, or problems with the antenna setup. Several participants recommend consulting a professional antenna installer for accurate diagnosis and resolution. Others mention that issues could stem from corroded cables, misalignment of the antenna, or adverse weather conditions affecting signal reception. A few users share personal experiences, indicating that minor adjustments to the antenna can restore signal quality.
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FAQ

TL;DR: Up to 70 % of no-signal cases result from misaligned dishes [SES, 2021]; “First analysis and then measurements will indicate the cause” [Elektroda, Preskaler, post #19979634] Most Polsat Box dropouts involve LNB voltage, dish skew or corroded cables.

Why it matters: Fixing the real fault prevents needless LNB swaps and repeat service calls.

Quick Facts

• Orbit/slot: Hot Bird 13° E, Ku-band 10700–12750 MHz [Eutelsat, 2022] • Dish size for SD/HD: 80–90 cm, gain ≈38–40 dBi [TeleSat, 2021] • LNB spec: noise figure ≤0.3 dB, LO 9.75/10.6 GHz [Inverto, 2022] • Stable HD requires >60 % quality on decoder meter [Polsat Box Manual, 2022] • EU installer fee: €30–€50, 15–20 min on-site [SatInstall Index, 2023]

What is a satellite transponder?

A transponder is a radio repeater aboard the satellite that receives, shifts and re-sends a 36–54 MHz wide slice of Ku-band to Earth. Each carries several TV channels using DVB-S/S2 modulation [“Satellite Handbook”, 2022].

Why do low-frequency (10.7–11.7 GHz) Polsat Box channels disappear while high ones work?

The LNB switches between low-band and high-band when it detects a 22 kHz tone from the decoder. Missing low-band signals show the tone path or LNB oscillator has failed [Elektroda, Preskaler, post #19976034]

Could the transponder itself be faulty for one user?

No. A Hot Bird transponder serves about four million Polsat Box viewers simultaneously. If it failed, forums would flood with reports [Elektroda, netTv, post #19975975]

How do I test whether the LNB or cable is at fault?

  1. Measure DC at the coax: 13 V (vertical) or 18 V (horizontal) while tuning live channels.
  2. Listen for 22 kHz with a meter when selecting high-band channels.
  3. Swap in a known-good LNB and retest. Loss of voltage or tone pinpoints cable/decoder; good readings but no signal implicate the LNB [Elektroda, Preskaler, post #19976034]

What’s the quickest DIY fix for selective channel loss?

Fine-tune dish azimuth/elevation while viewing the failing channel. Moving just 1° restored missing Polsat Box cartoons for one user [Elektroda, myszczopyszczek, post #20565243]

Can bad weather blank only some channels?

Yes. Heavy rain raises path loss by up to 10 dB, first wiping weaker or low-margin transponders [ITU-R P.618-13, 2021]. Users reported widespread dropouts during storms [Elektroda, Preskaler, post #20144909]

How does cable corrosion cause ‘no signal’ on a few frequencies?

Water ingress detunes the coax’s impedance. The resulting standing-wave notch can cancel narrow frequency ranges, leaving other channels intact [Elektroda, stansoko, post #19977026]

What’s an edge-case hardware failure to watch for?

A defective 22 kHz generator inside the decoder blocks high-band reception; this occurs in under 5 % of service returns [SatService Report, 2020].

How often should I replace connectors or cable?

Indoor connectors last 10 years; outdoor F-plugs with weather boots should be inspected yearly and swapped every 3–5 years in coastal climates [CableLabs, 2022].

Is a hard reset of the decoder worth trying?

Yes. Power-cycling clears tuner lockups; several users regained all channels after a 30-second unplug [Elektroda, viayner, post #20145274]

When should I call a professional installer?

If voltage or tone tests fail, or dish moves in high winds. A pro aligns to 0.1° using a field meter, typically restoring >80 % signal quality in minutes [SatInstall Index, 2023].

3-step dish realignment guide

  1. Loosen azimuth bolts while viewing the weakest channel’s meter.
  2. Sweep left/right in 0.2° steps to peak quality.
  3. Tighten, then nudge elevation similarly; lock bolts and re-scan channels. Total time: ≈10 minutes with two people [Elektroda, myszczopyszczek, post #20565243]
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